Floor-furnace.



' ber formed in the heating drum(i UNITED STATES PATENT OFFICE.

WILLIAM W. HOLMES AND JOSEPH N. HAWLEY, 01 LOS ANGELES, CALIFORNIA, ASSIGNOBS, DY DIRECT AND MESNE ASSIGNMENTS, '1'0 JAMES C. HOGLASEAN AND EDWARD M. SCBAOE, 30TH 0] LOB ANGELES, CALIFORNIA.

FLOOR-FURNACE.

Specification of Letters Patent.

Patented Mar. 19, 1918.

Appllcaticn fled June 15, 1818. Serial 110. 103,748.

To all whom it may concern:

Be it known that we, WILLIAM W. Home and JOSEPH N. HAWLEY, citizens of the United States residing at Los An les, in the county of Los Angeles and tate of California, have invented certain new and useful Improvements in Floor-Furnaces, of which the followin is a specification.

This invention re ates to improvements in floor furnaces and has particular relation to floor furnaces of the type in which the combustion chamber is vented, whereby all the products of combustion pass out of a smoke flue and do not enter the house through the register, the air to be heated being taken from the room and passed through and about a heating means, after which it is returned to the room.

It is an object of the invention to provide a device of this character in which the heating member or drum is entirely inclosed within outer and inner walls and in which the burner and the mixer supplying air thereto are incased within parts of the furnace whereby elements of danger from this source are entirely obviated.

It is also a further object of the invention to provide a floor furnace with a centrally mounted heating drum or casing having an air heating central passa e way therein, increasin in width from t e bottom upwardl w ereby the expansion of the air as it 1s heated tends to produce an upward draft through the furnace.

It is a further ob ect of the invention to provide a furnace of this character in which the burner thereof is mounted in the lower enlarged portion of the combustion chamthe products of combustion being directe upwardly and around all sides of the central heating flue with the exception of a small portion thereof on one side, a bafiie device being employed which thus directs the products of combustion, permitting the same to reach the outlet or smoke flue only after being thoroughly distributed about said heat flue, the said bafile also preventing the reheating of the said products of combustion as they are about to pass out through the said smoke flue.

With these and other objects in new the invention comprisescertain novel constructions, combinations and arrangements of parts as will be hereinafter more fully described and claimed.

In the accompanying drawing Fi re 1 is a vertical longitudinal sectiona view taken through a furnace constructed in accordance with this invention.

Fig. 2 is a transverse horizontal sectional view taken upon the line 22 of Fig. 1.

Fig. 3 is a detail perspective view of the baflie device employed within the combustion chamber of the furnace.

The furnace of the present invention is designed to afford a device of this character which, while being economical in construction will meet all the ordinary requirements usual in ordinances enacted for the protection of communities from fire and the like and also which will thoroughly vent the device whereby none of the noxious fumes due to the combustion of gas or like fuels, will be permitted to enter the house or dwelling to be heated. The furnace is of the tyfpe designed to be mounted in an opening ormed 1n the floor of a room of a dwelling and usually'provided with a re ister or open work top plate as 3. Depen ing from the register is an outer casing 4 substantially closed at the sides and bottom but open at the top save for the register 3. Within the said casing and suitably spaced therefrom is an inner casing 5 dependin from the register 3 and open at the to an bottom. An air passage is thus a orded between the casings for the entrance of air taken from the floor in the room. The inner casing 5 is shorter than the outer casin 4 whereby the air entering between sai casings may pass into the bottom of the inner casing and upwardly within and around a heating drum 6 which is spaced within the said inner casing. The said inner drum is formed with cross bars 7 secured to its ends at the bottom of the drum, and adapted to project beyond the sides thereof a suitable distance to rest upon supporting bars 8 which extend laterally of the casing 5 and which are bolted or riveted to the walls thereof near the lower end of the casing. The inner or heatin drum 6 is thus supported centrally wit 'n the inner casing 5 as: I aaaaeee and reaches nearly to the bottom of said inner casing and also to withina suitable distance of the register or grid 3 at the top.

The construction of the heating drum or furnace proper i-simportant sinceit secures a quick heating of the device and of .the air passed through and around it and at the same time utilizes a large proportion of the heat units for heating the air without permitting many of said heat units to escape at the outlet or smoke flue. The outer walls of the said drum 6 are preferably vertical insuring a proper passage way between the drum and the inner casing 5, entirely around the heating device. The said drum is usually made narrower than it is in length though of course other shapes and proportions may be employed without departing from theispirit of the invention. In the central portion of the. drum a depending heat flue as 9 is mounted, said flue being open at the top and bottom and the. top opening 10 is somewhat larger than the bottom opening 11. The said heat flue is thus given an upwardly flaring shape substantially forming an inverted truncated pyramid or cone. This construction also leaves an enlarged space around the lower end of the fluev within the drum which space is occupied by a burner 12 of any desired type. The combustion chamber 13 decreases in its dimensions from the bottom toward the top of the drum 6 and the products of combustion thus pass upwardly and around the flaring heat flue 9 in such a manner that the said heat flue may receive alarge portion of the heat units developed. The outlet flue 14 of the device enters the drum 6 above the burner 12 upon one side edge of the said drum. A baflle device 15 is mounted within the combustion chamber and is provided with inclined bottom portions 16 which extend over the burner between the end Walls of the drum 6 and the adjacent wall of the heat flue 9. These oppositely inclined portions 16 tend to divide the products of combustion and direct them outwardly and thence upwardly around the walls of the heat flue 9. The substantially upright portion 15 of the baffle prevent the products of combustion from reaching the outlet flue 14 until said products have passed upwardly and around upper inclined portions 17 formed upon the bafile and projecting between the side walls of the heat flue 9. The portions 16 which come quite close to the burner are preferably provided upon their under surfaces with a thick asbestos covering) 18. The asbestos covering is next to the urner and prevents the escape of heat above the portions 16, to any great degree and tends to keep the products of combustion, which have cooled considerably by the time they reach the outlet flue 14, from becoming re- -within sai casin heated again. The burner 12 preferably extends entirely around the flue 9 and is provided with a mixer 19- which pro ects through the end wall of the drum 6. The said mixer also extends within the walls of a small auxiliary casing 20 which is set into the walls of the outer casings 4 and 5 and projects closely to the heating drum 6. A fuel suppl pipe 21 extends to the recess 20 and a valve controlling nozzle 22 de ivers the fuel to the said mixer 19within said casing. The valve 23 which controls the fuel supply is also mounted within said casing and is formed with an upwardly projecting hollow stem 24 adapted to receive the squared end of an operating rod 25. A set screw 26 removably holds the said rod in said hollow stem.- The burner is preferably lighted by means of a pilot burner 27 which is supplied with fuel or gas from the pipe 21 by means of a branch pipe 28. A valve 29 controls the fuel supply for said pilot and a hollow stem 30 projects therefrom which is provided with a recess to receive the end of the squared operating rod 31, a set screw 32 being employed to, bind it in.place. Both of the rods 25 and 31 extend to the top of the furnace and project within a recess 33 formed in the register, so that an ordinary key or handle, not shown, may be applied thereto for controlling the burner or the pilot. The pilot and the burner may be initially lighted through an opening 34 formed in the .top of the drum 6, which "opening is normally closed by a hinged door 35 which is generally centrally glazed as at 36 for permitting of the inspection of the burner and pilot, to see whether they are properly lighted.

The "outlet or smoke flue 14 preferably passes through a thimble '37 mounted in the walls of the casings 4 and 5, as clearly shown in Fig. 1. Air for supporting combustion in the combustion chamber is introduced through a pipe 38 which passes through the walls of said casings 4 and 5 and enters the drum 6 near the bottom thereof.

The structure of the device will be seen to be such that the cooler air from the floor will readily descend the spaces in the furnace between the'walls 4 and 5 of the outer casings, and will pass upwardly around the hot walls of the drum 6 nd the heating flue 9 receiving the bulk of the heat units from said drum and delivering the air in highly heated condition within the room. The heating of the air within the flaring heat flue 9 will tend to establish a good draft within the furnace by reason of the expanding of the air, after it is heated within the upwardly enlar 'ng heat flue 9. The air for the products 0 combustion enters through the I mixing device 19 and through the air inlet pipe 38. The products of combustion pass upwardly around the flue 9 within the drum and thence around the side projections 17 of the baflle device 15 and thence downwardly to the outlet of smoke flue 14. The inclined walls of the heat flue 9 not only facilitate the rising of the heated Walls of the casings 4 and 5 are kept in cool condition by the constant inflow of air from the floor of the room, there being thus practically no danger to the floor and house structure from the heated portions of the furnace. The thimble 37 affords a cool air jacket space around the outlet flue 14, thus preventing the heating of the air entering between the adjacent walls of the casings 4 and 5.

What is claimed is 1. A floor furnace having outer and inner inclosing walls spaced to form air inlets, a heat drum supported centrally within the device and having a burner in the bottom thereof, said device having an outlet flue near the lower end thereof, and a baflle device having inclined lower portions presented to the products of combustion and adapted to divide and spread the same within the drum and upwardly and having laterally inclined portions arranged in the spaces between the drum walls for directing the products of combustion upwardly and entirely around the heated portions of ghe drum before returning to the outlet 2. A floor furnace havin outer walls and an inner heat drum, a urner within said drum, the said drum having an outlet flue arranged a little above the said burner, in one end of the drum, and a bafile device having a partition portion between the outlet and the burner, and provided with a heat excluding material covering the same and presented to the flames from the burner, and upwardly extending bafile portions on said device for further controlling the direction of the products of combustion.

3. A floor furnace comprising inclosing walls, a heat drum suspended within the same and having a combustion chamber surrounding a central heat flue, the said combustion chamber having an outlet flue in the lower portion thereof, and a baflle member mounted between the inner and outer walls of the drum and having a part thereof interposed between the furnace and the outlet flue, an asbestos covering upon the under surface of said interposed portions of the baflle member whereby the products of combustion in their substantially cool condition after they pass out of the outlet fiue will be protected from the heat of the burner, and means on the baflle device for properly spreading and directing the products of combustion.

In testimony whereof, we have hereunto set our hands, in presence of two witnesses.

WILLIAM W. HOLMES. JOSEPH N. HAWLEY.

Witnesses OASSELL SEvnRANon, Rosanne CARNES. 

